From efc8291dafe68435480bb5dd378cf26ee62d042f Mon Sep 17 00:00:00 2001
From: George Hazan <george.hazan@gmail.com>
Date: Thu, 14 Nov 2024 17:24:43 +0300
Subject: =?UTF-8?q?fixes=20#4641=20(Telegram:=20=D1=83=D0=B4=D0=B0=D0=BB?=
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---
 protocols/Telegram/src/proto.cpp  | 21 ++++++++++-----------
 protocols/Telegram/src/proto.h    |  2 +-
 protocols/Telegram/src/server.cpp | 10 ++++++++--
 3 files changed, 19 insertions(+), 14 deletions(-)

(limited to 'protocols')

diff --git a/protocols/Telegram/src/proto.cpp b/protocols/Telegram/src/proto.cpp
index 73834415b8..a61d72b6ba 100644
--- a/protocols/Telegram/src/proto.cpp
+++ b/protocols/Telegram/src/proto.cpp
@@ -349,21 +349,12 @@ int CTelegramProto::AuthRequest(MCONTACT hContact, const wchar_t *)
 
 INT_PTR CTelegramProto::GetCaps(int type, MCONTACT hContact)
 {
-	uint32_t ret;
-
 	switch (type) {
 	case PFLAGNUM_1:
 		return PF1_IM | PF1_FILE | PF1_CHAT | PF1_SEARCHBYNAME | PF1_ADDSEARCHRES | PF1_MODEMSGRECV | PF1_SERVERCLIST;
 
 	case PFLAGNUM_2:
 		return PF2_ONLINE | PF2_SHORTAWAY | PF2_LONGAWAY;
-
-	case PFLAGNUM_4:
-		ret = PF4_NOCUSTOMAUTH | PF4_FORCEAUTH | PF4_OFFLINEFILES | PF4_NOAUTHDENYREASON | PF4_SUPPORTTYPING | PF4_AVATARS 
-			| PF4_SERVERMSGID | PF4_REPLY | PF4_GROUPCHATFILES | PF4_IMSENDOFFLINE | PF4_SERVERFORMATTING;
-		if (GetId(hContact) != m_iOwnId)
-			ret |= PF4_DELETEFORALL;
-		return ret;
 		
 	case PFLAGNUM_5:
 		return PF2_SHORTAWAY | PF2_LONGAWAY;
@@ -371,9 +362,17 @@ INT_PTR CTelegramProto::GetCaps(int type, MCONTACT hContact)
 	case PFLAG_UNIQUEIDTEXT:
 		return (INT_PTR)L"ID";
 
-	default:
-		return 0;
+	case PFLAGNUM_4:
+		uint32_t ret = PF4_NOCUSTOMAUTH | PF4_FORCEAUTH | PF4_OFFLINEFILES | PF4_NOAUTHDENYREASON | PF4_SUPPORTTYPING | PF4_AVATARS
+			| PF4_SERVERMSGID | PF4_REPLY | PF4_GROUPCHATFILES | PF4_IMSENDOFFLINE | PF4_SERVERFORMATTING;
+
+		if (GetId(hContact) != m_iOwnId)
+			ret |= PF4_DELETEFORALL;
+
+		return ret;
 	}
+
+	return 0;
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////
diff --git a/protocols/Telegram/src/proto.h b/protocols/Telegram/src/proto.h
index dec95199dc..69737ba35c 100644
--- a/protocols/Telegram/src/proto.h
+++ b/protocols/Telegram/src/proto.h
@@ -102,7 +102,7 @@ struct TG_USER : public MZeroedObject
 	int64_t   id, chatId = -1;
 	MCONTACT  hContact;
 	int       folderId = -1, nHistoryChunks;
-	bool      isGroupChat, isChannel, isBot, isForum, bLoadMembers, bStartChat, bInited;
+	bool      isGroupChat, isChannel, isBot, isForum, bLoadMembers, bStartChat, bInited, bDelOwn = true, bDelAll = true;
 	CMStringA szAvatarHash;
 	CMStringW wszNick, wszFirstName, wszLastName;
 	time_t    m_timer1 = 0, m_timer2 = 0;
diff --git a/protocols/Telegram/src/server.cpp b/protocols/Telegram/src/server.cpp
index 9303509442..0f97275314 100644
--- a/protocols/Telegram/src/server.cpp
+++ b/protocols/Telegram/src/server.cpp
@@ -520,12 +520,16 @@ INT_PTR CTelegramProto::SvcLoadServerHistory(WPARAM hContact, LPARAM)
 
 ///////////////////////////////////////////////////////////////////////////////
 
-INT_PTR CTelegramProto::SvcCanEmptyHistory(WPARAM hContact, LPARAM)
+INT_PTR CTelegramProto::SvcCanEmptyHistory(WPARAM hContact, LPARAM bIncoming)
 {
 	if (auto *pUser = FindUser(GetId(hContact))) {
 		TG_SUPER_GROUP tmp(pUser->id, 0);
 		if (auto *pGroup = m_arSuperGroups.find(&tmp))
-			return !pGroup->group->is_channel_;
+			if (pGroup->group->is_channel_)
+				return 0;
+
+		if (!pUser->bDelOwn || (bIncoming && !pUser->bDelAll))
+			return 0;
 		
 		return 1;
 	}
@@ -586,6 +590,8 @@ void CTelegramProto::ProcessChat(TD::updateNewChat *pObj)
 
 	pUser->chatId = pChat->id_;
 	pUser->isChannel = isChannel;
+	pUser->bDelAll = pChat->can_be_deleted_for_all_users_;
+	pUser->bDelOwn = pChat->can_be_deleted_only_for_self_;
 
 	MCONTACT hContact = (pUser->id == m_iOwnId) ? 0 : pUser->hContact;
 
-- 
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